Average Co-Inventor Count = 2.47
ph-index = 4
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. U.S. Philips Corporation (6 from 14,087 patents)
2. Voest-alpine Automotive Gesellschaft Mb. Ii. (1 from 1 patent)
7 patents:
1. 4922880 - Fuel injector for internal combustion engines
2. 4796117 - Recording and/or reproducing apparatus
3. 4722239 - Gear mechanism
4. 4654730 - Tape cassette apparatus with helical spring cassette holder drive
5. 4563717 - Helical scan cassette recorder with improved tape threading
6. 4479157 - Mounting for a head drum of a helical scan recorder
7. 4395745 - Head-drum mounting for a helical scan tape recorder